Most Helpful Guy
People don't change to often. 9 times out of 10 within months he/she will go back to their old routines. What they did to annoy you or hurt you will always come back with time. So, if they hurt you enough to end the relationship the first time it's well worth to ignore or block on their text message. And continue moving on.
Most Helpful Girl
Just... don't. Why would you want someone who hurt you back in your life? Be strong and just ignore it. It's for the best.